How can I copy my movies to my flashed aTV and still utilize Parental Controls?
This may only work with iTunes content, not content copied with Fugu or CyberDuck. The Parental Controls built into the AppleTV are only for the synced/streamed content from iTunes. Saying that if you still wanted to add a Rating to a file, you first have to convert the Video_TS file with Handbrake to whatever format you want. Then you can use MetaX to find all the information you need from Amazon and other sources to edit the tag on the file to add in a Rating, PG, R, etc. Once that Rating is in the tag then iTunes will see that and once synced to the AppleTV then Parental Controls will work.